Abstract: A device for controlling the amount of time players occupy each of a plurality of tennis courts, while showing waiting players how long they must wait and which of the waiting players is to get the next available court. A central board has two dials for each court, one dial being set for the time when play is begun and the other dial being set for the time that the court will become available. The board has a sloping rack into which a tennis racket is placed by a member of each group waiting to play. Gravity tends to draw the sequentially placed rackets downward with the racket occupying the most downward position signifying the identity of the person who is to get the next available court. By inspection of the dials, the waiting players can tell when each of the courts is to become available.